| ; RUN: opt -run-twice -passes=verify -S -o - %s | FileCheck %s |
| |
| ; If a module contains a DISubprogram referenced only indirectly from |
| ; instruction-level debug info metadata, but not attached to any Function |
| ; defined within the module, cloning such a module with CloneModule was |
| ; causing a DICompileUnit duplication: it would be moved in indirecty via a |
| ; DISubprogram by DebugInfoFinder (making sure DISubprogram's don't get |
| ; duplicated) first without being explicitly self-mapped within the ValueMap |
| ; shared among CloneFunctionInto calls, and then it would get copied during |
| ; named metadata cloning. |
| ; |
| ; This is to make sure we don't regress on that. |
| |
| ; Derived from the following C-snippet |
| ; |
| ; static int eliminated(int j); |
| ; __attribute__((nodebug)) int nodebug(int k) { return eliminated(k); } |
| ; __attribute__((always_inline)) static int eliminated(int j) { return j * 2; } |
| ; |
| ; compiled with `clang -O1 -g1 -emit-llvm -S` |
| |
| ; CHECK: DICompileUnit |
| ; CHECK-NOT: DICompileUnit |
| |
| source_filename = "clone-module.c" |
| target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128" |
| target triple = "x86_64-apple-macosx" |
| |
| ; Function Attrs: norecurse nounwind readnone ssp uwtable |
| define i32 @nodebug(i32 %k) local_unnamed_addr #0 { |
| entry: |
| %mul.i = shl nsw i32 %k, 1, !dbg !8 |
| ret i32 %mul.i |
| } |
| |
| attributes #0 = { norecurse nounwind readnone ssp uwtable } |
| |
| !llvm.dbg.cu = !{!0} |
| !llvm.module.flags = !{!3, !4, !5, !6} |
| !llvm.ident = !{!7} |
| |
| !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 7.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: LineTablesOnly, enums: !2) |
| !1 = !DIFile(filename: "test.c", directory: "/Volumes/Data/llvm/build/obj") |
| !2 = !{} |
| !3 = !{i32 2, !"Dwarf Version", i32 4} |
| !4 = !{i32 2, !"Debug Info Version", i32 3} |
| !5 = !{i32 1, !"wchar_size", i32 4} |
| !6 = !{i32 7, !"PIC Level", i32 2} |
| !7 = !{!"clang version 7.0.0"} |
| !8 = !DILocation(line: 3, column: 72, scope: !9) |
| !9 = distinct !DISubprogram(name: "eliminated", scope: !1, file: !1, line: 3, type: !10, isLocal: true, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !2) |
| !10 = !DISubroutineType(types: !2) |